I live in columbia, SC and work for a local pool company. We have recently come in contact with some kind of pink mineral buildup on one of our plaster pools. I took a few samples of this pink substance to be tested, and when i scrape it off it flakes into small pieces. Its on the steps and floor of the pool around both of the main drains.

The substance seems to look like some kind of calcium. One of my friends in the business thinks it could be organic calcium.

The chemicals have been in great shape, calcium between 150-300 ppm, so until the samples come back im left scratching my head.. If anyone has info on this it would be great.

G

Guest

Don't know what 'organic calcium' might be. Scale is calcium carbonate, period. It can trap other things in it that give it a color. Pink is usually indicative of manganese in the water. Might want to test for that.

Guest

Post a full set of test results. It might give some of us some idea of what might be going on. There are some pretty sharp people on this forum with an excellent grasp of pool chemistry (REAL pool chemistry, NOT what's passed off for it in most CPO courses!)

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